[Qemu-devel] Emulation of early 486 CPUs (no fpu, no cpuid)

[bifferos]

Hi,

I'm trying to emulate a 486SX CPU, so was wondering how to knock out cpuid and 
fpu.  I've changed the definition of ID_MASK in target-i386/cpu.h to zero, and 
this prevents Linux from detecting cpuid capability.  Bit of a hack, because 
the instruction is still there, but never mind.  I've been trying to work out 
how to disable fpu emulation so Linux falls back on software emulation.

Can someone throw me a bone?

many thanks.
Biff.